Yi Jin Jing (Muscle-Tendon Strengthening Exercises) – Yi Jin Jing (Tendons Transforming Exercises) is method of health-building exercises aiming to strengthen muscles and tendons. Legend goes that monk Bodhidharma, the founder of Zen in China (circ. 527), advanced Yi Jin Jing. Health Qigong Yi Jin Jing inherits from traditional Yi Jin Jing 12 forms. It synchronizes the movement of turning, bending and extending, pulling and drawing of the muscles, spine, bones and joints, which benefits the regulation and controlling function of the spine cord.